In skin pass rolling, the average d

In skin pass rolling, the average deformation resistance change accompanying rolling speed changes is large, and without feedforward control, elongation rate fluctuations will increase, possibly exceeding the control range. As described in the Introduction, when a strict physical model is used to predict rolling force in feedforward control, the calculation load and adjustment load become problems.However, the prediction accuracy of simple models is inadequate. Therefore, this paper proposes a feedforward control method without a physical model, using the rolling force change during acceleration/deceleration quantified from past operational results and the relationship between the change of deformation resistance (yield point change) and change of rolling speed identified in advance by experiments.